Harrisville, PA 16020 Frost Dates
Harrisville, PA: when does the frost end?
Typically, the last spring freeze lands around 05/15, roughly 260 days out. Fall's first freeze usually shows up around 10/03, roughly 140 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Harrisville in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 5 weeks until Harrisville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/01 and only about 1 year in 10 sees frost after that.
Harrisville against the rest of the dataset
At roughly 140 frost-free days, Harrisville places 37,090 of 40,283 ZIP codes in this dataset. Within PA, it ranks 2,000 of 2,088.
Learn more
Before leaning on 16020's figures: the frost range explains how to read the range around Harrisville's dates instead of trusting one, while local microclimates explains what one yard in Harrisville can differ from the 16020 normal.